I've had dsl in my house now for about three years. When my Dad got it, he bought the shittiest wireless router/modem combo he could find. Now, he and my sister both have laptops that don't work on the wireless but my laptop works fine (which is the strange part). I set it to default settings so there is no mac filter and when they connect they either can't connect or they get limited or no connectivity.
Dsl in a problem in itself (IE goes out in the rain) but it has to be something wrong with the router if it's not letting people on except myself. Suggestions?